Interface dipoles of Ir(ppy) 3 on Cu(111)

The interplay of adsorption geometry and interface dipoles of the transition-metal complex Ir(ppy)3 on Cu(111) was studied using low-temperature scanning probe microscopy and density-functional-theory calculations. We find that the orientation of the molecule's intrinsic dipole moment with resp...

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Published in:Nanoscale 2019-07, Vol.11 (26), p.12695-12703
Main Authors: Queck, Fabian, Albrecht, Florian, Mutombo, Pingo, Krejci, Ondrej, Jelínek, Pavel, McLean, Alastair, Repp, Jascha
Format: Article
Language:English
Subjects:
Adsorption
Charged particles
Configurations
Contact potentials
Coordination compounds
Copper
Dipole moments
Scanning probe microscopy
Surface chemistry
Transition metal compounds
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cited_by cdi_FETCH-LOGICAL-c230t-4ab58866b31789fd58be42ead438aba6d401a896a3ee7912d76a4dd5b0e88b323
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description The interplay of adsorption geometry and interface dipoles of the transition-metal complex Ir(ppy)3 on Cu(111) was studied using low-temperature scanning probe microscopy and density-functional-theory calculations. We find that the orientation of the molecule's intrinsic dipole moment with respect to the surface has a strong influence on the total energy of the different configurations, where the most stable one has the molecular dipole moment pointing out of the surface plane along the surface normal. Adsorption-induced redistribution of charges results in an additional dipole moment that also points out of the surface plane for all configurations. Submolecularly resolved maps of the resulting local contact potential difference suggest that any in-plane dipole moment is very effectively screened.
doi_str_mv 10.1039/c9nr00934e
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source Royal Society of Chemistry:Jisc Collections:Royal Society of Chemistry Read and Publish 2022-2024 (reading list)
subjects Adsorption
Charged particles
Configurations
Contact potentials
Coordination compounds
Copper
Dipole moments
Scanning probe microscopy
Surface chemistry
Transition metal compounds
title Interface dipoles of Ir(ppy) 3 on Cu(111)
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